Adding plugin for NFSv4 Server stats
Modified default metrics to show values that actually change
Final cleanup before submitting pull request
Fixed output of dstat_mem_adv, added nick 'total'
Realized that change to mem_adv was not necessary. Accidentally ran
against system dstat rather than repo version.
Merge remote-tracking branch 'upstream/master'
Merge pull request #46 from elfurbe/master

NFS Stats for v4 Server